Engineer Reports for Wall Cracks & Subsidence - What Do I get?
๐ ๐ง๐๐ฝ๐ถ๐ฐ๐ฎ๐น ๐๐ฎ๐๐ฒ, ๐๐ผ๐๐๐ฒ ๐๐ผ๐ฟ ๐ฆ๐ฎ๐น๐ฒ; ๐ฆ๐ฝ๐ฟ๐ถ๐ป๐ด๐ณ๐ถ๐ฒ๐น๐ฑ ๐๐ฎ๐ธ๐ฒ๐
The building & Pest Report had identified a few small brick wall cracks & some slope in the floor that did not appear to be too serious, but just to be safe, he recommended that the buyer contacted Forensic Engineers to do an inspection and report.
๐๐๐๐จ ๐๐จ ๐๐ฃ ๐๐ญ๐ฉ๐ง๐๐๐ฉ ๐๐ง๐ค๐ข ๐ค๐ช๐ง ๐๐ฉ๐ง๐ช๐๐ฉ๐ช๐ง๐๐ก ๐๐ฃ๐๐๐ฃ๐๐๐ง ๐๐๐ฅ๐ค๐ง๐ฉ ๐๐ฃ ๐ฉ๐๐๐จ ๐๐๐จ๐;
๐ฏ.๐ญ ๐๐ ๐๐ฒ๐ฟ๐ถ๐ผ๐ฟ
- Left side wall โbendingโ
- Bed 1 front wall, partial rendering done
- Garage left entry gap
- Bath wall cracks & window reveal gap
- Bed 3 wall cracks & window reveal gap
- Kitchen wall crack
- Rear patio column lean
- Rear patio slab settlements of the rear-left corner & cracks
- Dining/living wall corner crack filled
- Living window reveal gap
- West wall window reveal gaps filled
- Living wall crack
- Bed 2 wall cracks under sill
- Bed 2/garage wall corner crack filled
- Garage rear wall crack over door
- Widespread variations in mortar shades
๐ฏ.๐ฎ ๐๐ป๐๐ฒ๐ฟ๐ถ๐ผ๐ฟ
- Garage floor slab cracks & west edge slab dampness
- Hallway/toilet ceiling cornice cracks
- Hallway/bed 2 ceiling cornice crack
- Living window architrave tension gaps
๐ฐ.๐ฌ ๐๐๐ข๐ข๐ฅ ๐๐๐ฉ๐๐๐ฆ
*Test locations are approximate. Carpet & underlay depths varied from room to room & carpet wear affected readings.
The findings show that there have been differential settlements of the house slab. Specifically, there is visible bending of the left wall, caused by settlements of the rear and front-left corner.
๐ฑ.๐ฌ ๐๐๐จ๐ฆ๐๐ฆ
๐ฑ.๐ญ ๐ฆ๐ถ๐๐ฒ ๐๐ผ๐ฟ๐ธ๐.
In this case, it is likely that original estate development civil works resulted in placement of loose landfill on sections of the block. It is apparent that consolidation of soft/loose soils under some areas of the slab have caused settlements, floor level variations and damages.
Ground movements, and particularly differential settlements have caused the slab level variations and the damages identified.
๐ฒ.๐ฌ ๐ฅ๐๐๐ข๐ ๐ ๐๐ก๐๐๐ง๐๐ข๐ก๐ฆ
๐ฒ.๐ญ ๐๐ฟ๐ถ๐ฒ๐ณ
The floor level variations and house damages have been caused by ground movements - particularly differential settlements. There is no urgency to do so, but assurance of stability and some reasonable correction of floor level variations would require some underpinning.
๐ฒ.๐ฎ ๐จ๐ป๐ฑ๐ฒ๐ฟ๐ฝ๐ถ๐ป๐ป๐ถ๐ป๐ด
We have illustrated the approximate underpinning locations (see yellow highlights on sketch), subject to the design engineerโs input.
We estimate that conventional underpinning utilizing reinforced concrete piers & headstocks would involve approximately 15 underpins.
A reasonable industry rate for underpinning would be approximately $2,500 - $3,500 per underpin location, but this may vary, subject to engineerโs design.
Establishment & general repair & clean-up costs also apply
๐ฒ.๐ฏ ๐จ๐ป๐ฑ๐ฒ๐ฟ๐ฝ๐ถ๐ป๐ป๐ถ๐ป๐ด ๐๐ผ๐ป๐๐ฟ๐ฎ๐ฐ๐๐ผ๐ฟ๐
Underpinning Contractors should be well established Registered Repair Builders who do all of the repairs and do not use subcontractors for any repair work;
๐ฒ.๐ฐ ๐ง๐๐ฝ๐ฒ๐ ๐ผ๐ณ ๐จ๐ป๐ฑ๐ฒ๐ฟ๐ฝ๐ถ๐ป๐ป๐ถ๐ป๐ด
As advised...
๐๐๐ง๐จ๐ฉ ๐๐ข๐ฅ๐ง๐๐จ๐จ๐๐ค๐ฃ๐จ ๐ค๐๐ฉ๐๐ฃ ๐ก๐๐
The impression was that the house had undergone some subsidence and had some "normal" wall cracks, and it looked like it was not serious.
But our thorough investigation found that the house was not stable at all, and ongoing settlements were causing the house slab to bend in the long direction (front-to back). And it was getting worse.
๐๐บ๐ฎ๐ด๐ถ๐ป๐ฒ ๐ถ๐ณ ๐๐ผ๐ ๐๐ฒ๐ฟ๐ฒ ๐ฎ ๐ต๐ผ๐บ๐ฒ ๐ฏ๐๐๐ฒ๐ฟ ๐ฎ๐ป๐ฑ ๐ฎ๐ณ๐๐ฒ๐ฟ ๐บ๐ผ๐๐ถ๐ป๐ด ๐ถ๐ป, ๐๐ผ๐ ๐ณ๐ผ๐๐ป๐ฑ ๐๐ต๐ฎ๐ ๐๐ต๐ฒ ๐ณ๐น๐ผ๐ผ๐ฟ ๐๐ฎ๐ ๐๐ถ๐ป๐ธ๐ถ๐ป๐ด ๐ฎ๐ป๐ฑ ๐๐ฎ๐น๐น ๐ฐ๐ฟ๐ฎ๐ฐ๐ธ๐ ๐๐ฒ๐ฟ๐ฒ ๐ด๐ฒ๐๐๐ถ๐ป๐ด ๐๐ผ๐ฟ๐๐ฒ ๐ฎ๐ป๐ฑ ๐๐ผ๐ฟ๐๐ฒ!
๐๐ญ๐ฅ๐๐ง๐๐๐ฃ๐๐๐ & ๐๐๐ค๐ง๐ค๐ช๐๐
Our subsidence investigations call on decades of soil testing experience. And we meticulously examine the building for gaps and cracks.
๐๐ก๐ค๐ค๐ง ๐ก๐๐ซ๐๐ก ๐๐ช๐ง๐ซ๐๐ฎ โ ๐๐๐ง๐ฎ ๐๐ข๐ฅ๐ค๐ง๐ฉ๐๐ฃ๐ฉ!
We always take a floor level survey which is Absolutely Essential for any subsidence and wall crack investigation.
Any respectable engineer subsidence report has to include a floor level survey. Without it, it is impossible to identify and interpret footing and slab movements and particularly, the severity and influence of house damages.
Home Owner Saved Thousands on Underpinning
Structural Engineer Underpinning Report:
Thinking of underpinning? Contact us for an Expert Structural Engineer Report.
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Polyurethane Resin Injection Underpinning? Slab Lifting Required
This Gymnasium floor is out-of-level and keeps on moving.
Our Structural Engineer investigation found the building is on Brisbane River compressible river alluvial soils. And that they are constantly, gradually subsiding.
Also, flood events and saturation of the founding soils also exacerbate the subsidence.
After a thorough investigation, our RPEQ Structural Engineer Report recommended ๐ฆ๐๐ฟ๐๐ฐ๐๐๐ฟ๐ฎ๐น ๐จ๐ฟ๐ฒ๐๐ต๐ฎ๐ป๐ฒ ๐ฅ๐ฒ๐๐ถ๐ป ๐ด๐ฟ๐ผ๐๐ป๐ฑ ๐๐๐ฎ๐ฏ๐ถ๐น๐ถ๐๐ฎ๐๐ถ๐ผ๐ป for re-establisment of an even floor surface.
There are a number of Companies offering Urethane Resin solutions for slab settlements and footing subsidence.
๐ง๐ต๐ฒ ๐ฝ๐ฟ๐ผ๐ฐ๐ฒ๐๐ ๐ฐ๐ฎ๐ป ๐ฏ๐ฒ ๐ฎ๐บ๐ฎ๐๐ถ๐ป๐ด๐น๐ ๐ฒ๐ณ๐ณ๐ฒ๐ฐ๐๐ถ๐๐ฒ, ๐ผ๐ฟ ๐ถ๐ ๐ฐ๐ฎ๐ป ๐ฑ๐ผ ๐ฎ๐ฏ๐๐ผ๐น๐๐๐ฒ๐น๐ ๐ป๐ผ๐๐ต๐ถ๐ป๐ด ๐ฎ๐ ๐ฎ๐น๐น. Depending the type of construction and the ground conditions and most importantly, The Experience of the Company doing the work.
If you are considering Resin Injection Underpinning, it is advisable to get an independent engineer report first.
Expert RPEQ Structural Engineer Reports: Forensic Engineers.
Subsidence, Wall Cracks, Sink Holes, Stump Damage
Structural Engineer Reports needed from Forensic Engineers.
These are cases we deal with every day.
Case 1) A house at Warner had serious settlements under a slab. We found the causes, assessed the slab condition and gave expert recommendations to re-support the slab. In this case pressure grouting was the most practical and affordable repair.
Case 2) A Tweed Heads house with possibly serious subsidence problems. We found that there had been some footing settlements a long time ago, but the house was now stable. Some drainage work and expert crack repair required - no underpinning needed! A terrific result.
Case 3) Walloon house with serious slab movements. We are in Walloon just about every week! If you are looking to buy a house in this area and the Building & Pest Report finds wall cracks - for peace-of-mind, call us to arrange an Expert Structural Engineer Report. In most cases there are some movements of the house footings and site works can help to keep the house relatively stable. In other cases where serious movements and damages are evident, traditional underpinning is the most effective method for stabilization, level correction and crack closure.
Case 4) A house on-the-market at Stafford. The buyer was concerned that damaged stumps have caused structural damages to the house. Our expert investigation found that apart from some stumps that were past their "use-by" date, the house was "sound-as-a pound".
Forensic Engineers: Expert RPEQ Structural Engineer Reports
Structural Engineer Reports - All in a Day's Work
๐ก๐ผ๐ฟ๐๐ต ๐๐ผ๐ผ๐๐ฎ๐น - ๐ฅ๐ฒ๐ป๐ผ๐๐ฎ๐๐ถ๐ป๐ด ๐ต๐ผ๐๐๐ฒ ๐๐ถ๐๐ต ๐๐ฎ๐น๐น ๐ฐ๐ฟ๐ฎ๐ฐ๐ธ๐
The owner of a 1970's bungalow was renovating and needed expert advice about how to repair cracked and displaced bricks. Our expert Structural Engineer Report found that footing settlements and rotation was the cause. And we recommended a number of procedures to stabilize the footings and some practical and affordable methods to repair the damaged bricks
๐๐๐ฟ๐น๐ฒ๐ถ๐ด๐ต ๐๐ฒ๐ฎ๐ฑ๐ -๐ข๐น๐ฑ ๐๐ฎ๐น๐น ๐ฐ๐ฟ๐ฎ๐ฐ๐ธ๐
This house was for sale with some old subsidence and repaired cracks. Our engineer investigation found that there had been some footing settlements due to loose material in the footing bases when the concrete was poured. And to complicate matters, since then seepage had been softening the founding material and causing more settlements. The seepage problem and this had stabilized the footings and now the the house is "sound-as-a-pound".
๐ ๐ ๐๐ฟ๐ผ๐๐ฏ๐ - ๐ฅ๐๐๐๐ถ๐ป๐ด ๐๐๐ฒ๐ฒ๐น ๐ฝ๐ผ๐๐ ๐ฏ๐ฎ๐๐ฒ๐
We found the post galvanizing had been damaged by the concretors during the build, and the post bases had not been "tanked". Cleaning and treating post bases will prolong the life of some posts, but post replacement will be required in the future.
๐ฅ๐ผ๐๐ฒ๐๐ผ๐ผ๐ฑ - ๐๐ฎ๐ฝ๐ & ๐๐ฟ๐ฎ๐ฐ๐ธ๐
This house had serious gaps and cracks. And we found that the house slab had very serious deflections that were progressing. And significant underpinning would be required to stabilize the house before it could be properly repaired.
๐ฆ๐ฝ๐ฟ๐ถ๐ป๐ด๐ณ๐ถ๐ฒ๐น๐ฑ ๐๐ฎ๐ธ๐ฒ๐ - ๐ช๐ฎ๐ณ๐ณ๐น๐ฒ ๐ฝ๐ผ๐ฑ ๐๐น๐ฎ๐ฏ ๐ฒ๐ฑ๐ด๐ฒ ๐ฏ๐ฒ๐ฎ๐บ ๐ฑ๐ฎ๐บ๐ฎ๐ด๐ฒ.
We inspected this house for the buyer. And we found that a small section of the slab edge beam concrete had broken away and the edge reinforcement was exposed. Our investigation found that the damage was localized and the slab had no significant deflections in this area. Our expert structural engineer report recommended simple cost-effective grout repairs repairs.
๐๐ผ๐ฟ๐ฒ๐ป๐๐ถ๐ฐ ๐๐ป๐ด๐ถ๐ป๐ฒ๐ฒ๐ฟ๐ ๐๐
๐ฝ๐ฒ๐ฟ๐ ๐ฅ๐ฃ๐๐ค ๐ฆ๐๐ฟ๐๐ฐ๐๐๐ฟ๐ฎ๐น ๐๐ป๐ด๐ถ๐ป๐ฒ๐ฒ๐ฟ ๐ฅ๐ฒ๐ฝ๐ผ๐ฟ๐๐
Body Corp: Structural Engineer Report, SUBSIDENCE & WALL CRACKS
Wall Cracks, Subsidence, Underpinning, Structural Engineer Reports
HERE ARE SOME RECENT CASES;
SINK HOLES IN TAIGUM, SERIOUS HOUSE SETTLEMENTS IN KURABY & BAD SUBSIDENCE IN MERMAID WATERS
๐ ๐ช๐จ๐ฉ ๐ ๐ฉ๐ฎ๐ฅ๐๐๐๐ก ๐๐๐ฎ ๐๐ค๐ง ๐๐ค๐ง๐๐ฃ๐จ๐๐ ๐๐ฃ๐๐๐ฃ๐๐๐ง๐จ.
๐ง๐ฎ๐ถ๐ด๐๐บ ๐๐ฎ๐๐ฒ - ๐ณ๐ผ๐ฟ ๐๐ต๐ฒ ๐ฆ๐๐ฟ๐ฎ๐๐ฎ ๐ ๐ฎ๐ป๐ฎ๐ด๐ฒ๐ฟ๐.
- A broken water pipe had caused a large sink hole to form under a townhouse driveway.
- The residents we are afraid that the driveway could collapse and that other damages might appear!
- Thank goodness that our Expert Investigation found that the slab had not been damaged.
- The damage was localized.
- So we recommended the hole could be filled and the driveway slab re-supported using either Polyurethane Resin Injection, or with hyflow cementitious grout aka "Mud-Jacking".
๐ง๐ต๐ฒ ๐๐๐ฟ๐ฎ๐ฏ๐ C๐ฎ๐๐ฒ - ๐ณ๐ผ๐ฟ ๐๐ต๐ฒ ๐ฃ๐ฟ๐ผ๐ฝ๐ฒ๐ฟ๐๐ ๐ ๐ฎ๐ป๐ฎ๐ด๐ฒ๐ฟ.
- This older house had serious movements of the perimeter footings and the stumps under the floor.
- Most of Kuraby has highly plastic clay founding soils which can cause footings to seriously lift and settle and often "rotate" (lean).
- The footings had moved so much that the timber floor had become unstable.
- So we recommended vacating the house. And then comprehensive re-stumping & replacement of the perimeter base and footings.
๐ ๐ฒ๐ฟ๐บ๐ฎ๐ถ๐ฑ ๐ช๐ฎ๐๐ฒ๐ฟ๐ - ๐ถ๐ป๐๐ฒ๐๐๐ถ๐ด๐ฎ๐๐ฒ๐ฑ ๐ณ๐ผ๐ฟ ๐๐ต๐ฒ P๐ฟ๐ผ๐ฝ๐ฒ๐ฟ๐๐ O๐๐ป๐ฒ๐ฟ.
- The townhouse complex is located on compressible landfill which has been slowly settling for decades.
- We identified recent cracks and gaps and serious variations in the floor levels which would be due to active settlements of the founding materials.
- We considered a number of methods for stabilizing the house footings and the only reliable one would be using conventional underpinning, possibly incorporating some steel screw piers where a water table is encountered.
๐๐ ๐ฝ๐ฒ๐ฟ๐ ๐ฆ๐๐ฟ๐๐ฐ๐๐๐ฟ๐ฎ๐น ๐๐ป๐ด๐ถ๐ป๐ฒ๐ฒ๐ฟ ๐ฅ๐ฒ๐ฝ๐ผ๐ฟ๐๐ ๐ณ๐ผ๐ฟ ๐ฆ๐๐ฟ๐ฎ๐๐ฎ ๐ ๐ฎ๐ป๐ฎ๐ด๐ฒ๐ฟ๐, ๐ฃ๐ฟ๐ผ๐ฝ๐ฒ๐ฟ๐๐ ๐ข๐๐ป๐ฒ๐ฟ๐ & ๐ฃ๐ฟ๐ผ๐ฝ๐ฒ๐ฟ๐๐ ๐ ๐ฎ๐ป๐ฎ๐ด๐ฒ๐ฟ๐
Renovating a House with Subsidence and Wall Cracks
๐๐๐ฃ๐ ๐ฉ๐๐ ๐พ๐๐ช๐จ๐
It's really important to find the actual cause of the cracks, so that any repairs will last and cracks don't re-appear again and again.
๐๐ญ๐ฅ๐๐ง๐ฉ ๐๐ฃ๐๐๐ฃ๐๐๐ง ๐๐๐ฅ๐ค๐ง๐ฉ
That's why the owner of this Carindale house called Forensic Engineers to prepare an expert Structural Engineer Report.
Our expert investigation found old and recent subsidence & cracks, and footing settlements as well as footing rotation (leaning). We also identified that the house was built on an old gully that had been filled in and the landfill was subsiding bit-by-bit, year-after-year and this was causing the house cracks.
๐๐๐๐ฉ ๐ฉ๐ค ๐๐ค ๐๐๐ญ๐ฉ
Our expert Structural Engineer Report found that Stabilizing the footings and permanent wall crack repair would require underpinning of most of the house footings with conventional underpinning.
๐๐ค๐ง๐๐ฃ๐จ๐๐ ๐๐ฃ๐๐๐ฃ๐๐๐ง๐จ ๐๐ง๐ ๐๐๐ง๐ ๐ฉ๐ค ๐๐๐ก๐ฅ
Home renovations are expensive, so if there are any worrying wall or ceiling cracks, it's really important to make sure the foundations are stable by getting an expert independent Engineer Subsidence Report from Forensic Engineers from the get-go
EXPERT ENGINEER WALL CRACK & SUBSIDENCE REPORTS: FORENSIC ENGINEERS ARE HERE TO HELP!
FORENSIC ENGINEERS ARE HERE TO HELP!
Wall, ceiling or floor slab cracks may be simple wear & tear, or they may be a sign of something more serious.
It may Subsidence that has occurred in the past and was not serious and has stopped. Or it may be serious Subsidence that could be getting worse and worse.
And there are also cases where subsidence & cracks have cleverly been covered up, particularly with houses that are renovated & "flipped".
Forensic Engineers are the subsidence experts and are here to help!
Expert advice from Forensic Engineers: Our expert Structural Engineer Reports identify old and new subsidence and cracks and determine if they are serious or wear-and-tear.
And we identify if they are likely to get worse and if any stabilizing or underpinning is necessary.
Peace-of-Mind; Building cracks can develop due to normal wear & tear or from foundation movements and Forensic Engineers are the independent experts to turn to for an expert analysis and for peace-of-mind.
